Siemens SINAMICS V90, SIMOTICS S-1FL6 Error A30031: Hardware current limiting in phase U

Industrial motor drive · taken from the manufacturer’s manual, pages cited

Fault codeA30031

Hardware current limiting in phase U when hardware current limit for phase U has responded, possibly due to incorrect parameterization or motor/power cable fault. The manual's first action is: “Check the motor data. As an alternative, run a motor data identification.”

Model
Siemens SINAMICS V90, SIMOTICS S-1FL6
Display shows
Hardware current limiting in phase U (A30031)
Type
Fault code
Source
Manual p. 312

What A30031 means

Hardware current limiting in phase U p. 312

Common causes

  • Hardware current limit for phase U responded. The pulsing in this phase is inhibited for one pulse period. p. 312
  • Closed-loop control is incorrectly parameterized. p. 312
  • Fault in the motor or in the power cables. p. 312
  • The power cables exceed the maximum permissible length. p. 312
  • Motor load too high. p. 312
  • Power unit defective. p. 312

Safety warnings — read before you start

  • DANGERGeneral Safety Instructions. Qualified Personnel The product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation, in particular its warning notices and safety instructions. p. 2
  • WARNINGRisk of Electric Shock and Fire. Risk of electric shock and fire from supply networks with an excessively low impedance Excessively high short-circuit currents can lead to the protective devices not being able to interrupt these short-circuit currents and being destroyed, and thus causing electric shock or a fire. p. 12
  • WARNINGElectric Shock if No Ground Connection. Electric shock if there is no ground connection For missing or incorrectly implemented protective conductor connection for devices with protection class I, high voltages can be present at open, exposed parts, which when touched, can result in death or severe injury. p. 12
  • WARNINGElectric Shock Due to Unsuitable Power Supply. Electric shock due to connection to an unsuitable power supply When equipment is connected to an unsuitable power supply, exposed components may carry a hazardous voltage that might result in serious injury or death. p. 12

What to do

  1. Check the motor data. As an alternative, run a motor data identification. p. 312
  2. Check the motor circuit configuration (star-delta). p. 312
  3. Check the motor load. p. 312
  4. Check the power cable connections. p. 312
  5. Check the power cables for short-circuit or ground fault. p. 312
  6. Check the length of the power cables. p. 312

If A30031 is still not resolved

  • Contact service / dealer for assistance p. 2
    “Qualified Personnel The product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the relevant documentation, in particular its warning notices and safety instructions.”
  • Contact service / dealer for assistance p. 13
    “NOTICE Property damage due to loose power connections Insufficient tightening torques or vibration can result in loose power connections. This can result in damage due to fire, device defects or malfunctions.”
Open the manual at page 312 All SINAMICS V90, SIMOTICS S-1FL6 error codes Manual details & download

This page summarises what the manufacturer’s manual says about A30031; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Siemens. Found a mistake? Report an error.